[HAM] CV - No Vibrato -PR20 -No Reverb

[mtcasino]

That is a reverb switch kit. Transformer, resistor, capacitor & switch.

On the back of the pre amplifier the ground and vibrato ground connect
together.

They should be labeled "GND" & "VIB GND".


<snip>

  The Vibrato on the CV and the Reverb on the PR-20 are both not working.
  I have had all of the tubes tested and replaced the bad ones.
  There is a Reverb unit by Edward Controls in the organ which
  I have disconnected while tracking down other issues . Also , I figured
I didn't need it since there is reverb in the tone cabinet.
  Could I have disrupted the ground circuitry when I disconnected the 
reverb unit ?
   According to the PR-20 schematic there is an optional reverb switch 
that mounts at the
console that seems to work mainly by disrupting ground to the cabinet.
  If the G terminals are hooked up but ground is not , would I still get 
sound through the
  tone cabinet ? Is it possible that a broken ground someplace would 
cause the reverb and
vibrato not to work ?
  Where does the ground terminal actually connect to ground?
  David D. 

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